Pump.



PUMP.

Y .Ammwmmwmmn 5, 1912.

Eatented Dec. 1G, i912.

2 SHEETS-SHEET l.

I (imi/tum@ E. J. COOK.

PUMP.

4APPLICATION FILED Mu, i912.

Paten'd Dec. 10, 1912.

2 SHEETS-SHEET 2.

A?. i as.

@Ho/IMM! 'n -55 or any other suitable EVERETT J. COOK, DETROIT, IJIICLI PUMP.

Yb all @257mm 'it may concern.'

Be it known that I, EVERETT J. Coon, a citizen of the United' States, residing at Detroit, inthe county of Wayne, State of Michigan, have invented certain new and useful Improvements in Pumps, of which `the following is a specification.

This invention relatesV to pumps and more particularly to air pumps adapted to be carried on a motor vehicle and driven by the engine thereof for the purpose of supplying air for filling thejtires, etc. I The objects of the invention are vto provide a pump-which maybe readily thrown into operation and which will be automatically stopped when a cert-ain predetermined air pressure is obtained.

The novel features of the invent-ion will be apparent' from the following description taken in connection with the accompanying drawings, in which:

Figure 1 is a plan view of a portion of an automobile showing my invention applied thereto. Fig. 2 is a central longitudinal section of a pumpembodying my invention. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4 is a perspective view of a detail of the invention., Referring to the drawings 10 indicates the framey of an automobile, 1l the front wheels thereof and 12 the engine. At any convenient point, preferably on the frame of the automobile, I secure the pump indi cated generally by the numeral 13 so as to be driven by the fly wheel 14 or any other suitable rotating part of the engine. In order to drive the pump from the iy wheel I prefer to use a friction wheel 15 mounted on the shaft 16 of the p1l mp and adapted to engage the periphery o the Wheel 14.

The pump may consist f any desired arrangement of cylinders an means -for reciprocating the pistons therein, but I prefer to use oppositely arranged cylinders 16 and l 17 provided respect-ively with pistons 18 and 19.- 'Ihe pistons 18 and 19 *are connected together by means of the spaced rods 2O and 21. The cylinders 16 and 17 are secured to a casing 22 which is provided with lugs 23 and 24 for attaching the pump to the automobile. One side of the casing 22 is provided With a suitable opening which is closed by means of the cover plate 25, this plate belng secured to the casing by screws means. The/cover plate 25 is provided with a bearing 26 in Specification of Letters Patent. Application filed March 5, 1912.

Serial No. SS..

which the shaft 16 is bearing sleeve t the wear due to inc t the shaft. .The shaft 16 proie t through elongated ce slots in' the rods 2O ano, 21 and is provided with an eccentric 28 which vthe rollers 29 and 30 e rried by the reds 2() and 21. By this Constr' n the rot. n of the shaft 16 causes t is to be ieciproe5 cated. The outer cylinders are preferably scr at 31 ,to receive the plugs n ced in diameter at their inner washers Si wh The pistons 1S an i with cup washers h act valves. Each of the ev nder is with suitable inlet ports and tis iarge ports 37, the latter ports pre arly ccnnect- "5 ing with a conduit which may commnnicate with a pipe for conreying the air to a storage tanl: or point of use.

I preferably ar. .inge ide one of the cylinders and "ci :gral therewith a cylinder 411 ham. l a "ton L2 which is secured to a suitable-rot The outer end of the'cylinder is sun ic *threaded aud l provided with. a The outer end of the pis threaded as at 'torpe tween which is amai' e member lila.

The shaft 16 projets inwardly from the bearing 26 and has slidaciy niiouud there on the wheel 15. A suitable spring is 9G secured to the end of the shaft 16 by means of the screw 19 and has s endportions bearing against the hub of afl screw- E35 ne wheel 15 so as to press the wheel .toward the lbearing 26. A spring 50 is prefe lv secured to the 95 cylinder 1G' by means o s 51 and is suitably offset and previa with an elongated slot 52 through which the shaft 16 extends. The free end of the spring 5G is provided with a cam oer preferably in the forni of a rec Iuler block. rlhe spring 50 normally tends te nic-ve toward the bearing 26, but is arranged to be pressed outwardly against the wheel 'l5 and in order to prevent undue wear of the parts I provide suitable washers between the hub of the wheel and the sp1 ne'. In order to move the 'spring 50 entwarf v inst the wheel I may use any suitable n whanism, such as the lever 55 which )ivotally connected to the bracket 56 secured to :r suitable cart of the vehicle. tiny s.. blc operating lmechanism 57 may be connected witlrthe lever 55 so as to move the latter from any convenient point on the vehicle. Arranged in the voylinder engage the latter s as to :limit the outwarrilv movement of the piston. A suitable port 60 connects the interior 'of the cylinder 4l; between the piston 42 and the plug 44 with the .discharge conduit of the pump so that the piston 42 is at all times subject to the glischarge pressure.

The operation of the pump is a follows: The Wheel 15 will be moved into engagement with the fly Wheel 14 oi the engine by pressing the'spring 50 outwardly by means:- of the lever 55 and 'tbe operating mechanism 57. V'Vhen the Wheel yis in engagement "with the fly Wheel of engine-the `ump will be operated and the parts will e in the position shown in Fig. 2, the spring 50 being held in the outward position by the member 47 which engages the side of the ea1n`53, the spring 5S holdingr the parts in this position. As the pressure inoreases the piston 4?. will. be depressed, thereby oomressinrr the spring 5S-and moving the ment` ber 47 downwardly along the snriaoe of the 021111,53. When the member 47 passes by the lower edge of the cam 53 it will be seen that the spring 50 will. move toward 'the bearingr the wheel 15 out of to press the as i elaine all modieations 26, thereby permitting engagement with the Wheel 14 so as to stop the pomp. Under these conditions the lower side of the cam 53 will engage the upper side of the member 47, thereby holding the spring 58 in oom-- pression even. after thev pressure is removed from the piston 42. When it is desired. to again operate the pump it is only necessary spring 50 outwardly in the manner above described until the earn 53 is dis-- engaged from tlre member 47', when tbe latter will be drawn upwardly by :means of the spring 58 to the position shown in Fig. 2. In order to adjust the 'ump to be thrown out of operation at di erent pres, sures l. have provided the serow threads 45 and the nuts 46 and as will be readily understood the pressure at which the pump will be stop ed may mem erv 47 upwardly or downwardly .along the rod 43, depending on Whether 'it is desired to increase or decrease the pr saure.

It will be understood that various changes may be made in the details of the apparatus Without departinor from the spirit of my in vent-ion and.. I ave therefore illustrated what I oonsider'the preferred embodiment of my invention, but do not Wish'. to be limited tothe details shown and described thereof which I 41 and surrounding Athe rod 43 1s a Coil spring 58 Winch the spring 48 to force be changed by moving the come 'within the scope o't` the appended claims.

Haring Ythusdoseribed the invention what l claim. as new and desire to secure by Letters Patent is:

l. ln a pump, the oombinatiou of a eylinder, a piston therein, a shaft, merma con nesting the piston and the shaft and adapted to reciprocate the piston Athe shaft is rotated, an axially movable Wheel on the shaft, means ada1, ted to move said Wheel in one direction along said shaft, means for normally holding ment by said last-mantlened means, and pressureactmated means adapted to release said holding means.

2. ln a pump, the combination of a cylinder, piston, a shalt, means connecting the piston and the shaft and adapted to reciprocate the piston as the shaft is rotated, a driving; lvlieol for said shaft adapted to be moved axially relative thereto, a spring actuated member arranged to engage said wheel, means for holding said member against said WheelV to prevent movement of the latter in one direction, and pressure-aot-nated means adapted to release holding deans. y

l. a pump, the eoiiflbmation el. a eyhnder, a i sten, a shalt, mean. connecting the piston and the shi-.tt and adapted to ree1proeate the piston as the shaft is rotated, a driving Wheel slidably mounted on said shaft, a spring-actuated member arranged to engage said wheel, means for holding member against said wheel to prevent movement of the latter in one .direction` pressure-animated means adapted to be aotuated at a pradet rmined ",iressure'for releasing .said holding means, and means for ad'usting said pressure actuated means for di erent pressurea '4. ln a pump, the imiabination of a oylindex, a piston, a' sli-aft, means connecting the piston and the and adaptedto re eiproeate tl nieton as it ft is rotated, a driving Wheel bly i lated on said shaft, a spring adapted to move said wheel in one direetion, a member adapted to move said-wheel in opposition to said spring, means for holding said member against the Wheel, and pressureaotuated means for re leasing said holding means.

5. In a pump, the combination of a cylinder, a piston, a shaft, means connecting the piston and the shaft and adapted to reciprocate the piston the shaft is rotated, a driving `Wheel slidably mounted on said shaft, a springaetuated member adapted to be pressed against said Wheel and normally tending to move away Wheel, a rain. earried by ondoylinder, a piston tlerein, a spring adapted to oppose the movement of said piston in one direction, earn member oonsaid 'Wheel against movep from the y said member, a secist TS o

neeted with said last-mentioned piston and adapted to cooperate with the tirstfmentioned cam to normally hold saidspringaetnaled member against said wheel, and a port connecting said Cylinders.

G. In a pump, the combination of a Cylinder, a piston, :L shaft, means connecting the. piston andthe shaft and adapted to reriproeale the piston ai the shaft is rotated, a driving wheel slidably mounted on said Ihath z :spring adapted-to move said wheel in one direi-tion, a spring member having one end lixed and provided en its opposite end with al cam, a pref-snre-aet1ialed Cam memher adapted to vcooperate with saidfire'tmentioned eam to hold the spring memher againstthe wheel and to permitthe spring member lo more mit ot engagement with the wheel al :L pre1lelermined preesnre.

T. In a pump. the combination ot' a cylinder, a pieton. a ehat't, mennel connecting the piston and the ha'lt and adapted to re eipror'ale the pi lnn as the rxhal't is rotated, :L driving' wheel rlidahly mounted on Said ahal'l, :L pring' adapted lo 'move #aid Arvheel in one direrlimi along lhe ehai'l. a pring memher haring' one end fixed and provided on i|.-\` opposite end willi :L cam, a ealn meuh her arranged to cooperate will! said lirst" mentioned rain lo hold the spring' member agrainzl-l the wheel with said spring retracted, a spring adapted lo more said eam memher in one direrlion. a pres'smeaclnatedrilevi L L-onfzeL-h-l with Lid ram memher and'adap` ed lo mme (he latter .in opposition to said l;L l-ine|LliL.ne l spi-ing lo permit the spring memlwr in mow, ont nl engagenLeutI with the Wheel, and means for adjusting one of the cam members to permit such movement 01'" the spring member at dierent predeter-V mined pressures.

8. n a pump, the combination of a cylinder', a piston, a shaft., means connecting the piston and the shaft and adapted to reciprocate the piston as the shaft is rotated, a drivingnvheel slidably mounted on Said shaft, a spring member having one end xed and provided on its opposite end with a cam and arranged to engage said Wheel to move the Same along said shaft, a second cylinder having a piston therein, a member connected with said piston and adapted to cooperate With said cam to hold the spring memher in engagement. with the Wheel, means for. connecting the interior of said second cylinder with the discharge conduit ot the pump so as to subject one sidepf the piston therein to the discharge pressure ot the, pump, a spring arranged to oppose the pressure on said pistons, and means for moving Said spring lmember toward said wheel to slide the latter` along Said shaft, said cam and its cooperating member being arranged to permit the spring member to more out ot engagement with the LWheel when a predetermined pressure is reached and to be interloeked by sueh movement of the lapring member.

In testimon)T whereof I affix my signature in presence ot' two witnesses.

nvr; LETT J. oooK. ll'itnesses:

l-l. C. Annals, Ilvinzn'm M. Coon. 

